1.Product size- 45x15x10 mm
2.Weight -4g
3,Max. saturation sound pressure level(OSPL90)-130dB±4dB
4,Full on Acoustic Gain-≥ 40dB
5,Total Harmonic Distortion(THD)-≤10%
6,Frequency Response-450Hz~3800Hz
7,Battery-AG13/LR44/L1154
8,Battery Current Drain-4 mA
9,Rated Voltage-1.5 V
10,Special Function Key - H-L